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eonora against the form and against each other by the rollers 22, while the drum 16, held to a relatively slow peripheral speed by the sprocket chain 18, effects a uniform, progressive, longitudinal stretching of the middle zone of the fabric whereby the latter, in sliding-over the shaping shield 12 is caused to be additionally stretched longitudinally in its middle zone and flexed-laterally to ill-shape,

the form, which pulls forward said middle zone, as compared with the inner parts of the form, which receive and pull forward said side margins.- The shield 12, by reason of its form and position and the relatively great tension imparted to the middle zone of the strip by the relatively high speed of the forms crown, engages the strip with greater frictional drag at the middle zone than at the margins, and thus edects a localized stretching of the strips middle zone immediately adjacent the latters point of application to the form. lln so stretching and pro-shaping the middle zone of the strip just prior to the latters passing onto the form, the shield 12, by its frictional engagement with said middle zone, prevents the.

pull of the forms crown from setting up such oblique stresses in the reach of fabric anterior to the shield as unduly to stretch the side margins of the strip and thus require them to be greatly ire-shortened, with consequent buckling, as they pass onto the form. With the erifpheral speed of the inner margins of t e orms work-receiving faces approximating that of the stretching drum, it will be seen thatthe side margins of the fabric strip may be drawn onto the form without being greatly stretched, the stretch of the middle zone being localized at its point of application, where all oblique lines of force running to the side margins are disposed at such obtuse angles to the edges of the strip as not tobe efiective sub stantially to elongate said margins, while the lines of force disposed more nearly parallel with the length of the strip are of ittleetlect anterior to the shield because of the relatively great snubbing edect of the latters crown ortion. lt willthus be seen that, as define claims, lletiect a bending of each half of the fabric strip substantially in its own lane by winding it onto a non-cylindrical ace of a form and, by hold-back or tensioning engagement with the stripsubstantially at its point of application to the form, imparting thereto a stretch which in degree is progres sive laterall of the strip.

lhe lammated, transversely U-shaped in certain of the appended structure 25, as shown in Fig. 3, being thus built upon the form, the fabric strip is severed approximately at its point of application; and said structure is circumferentially slit at its crown, as shown in Fig. 3, by means of the cutter 24, whereby two moldable disk blanks are produced. I do not wholly limit myself to a single cut at the crown, however, as in some instances it may be desirable to eliminate the more sharply curved portion at the outer periphery of the blank by cutting'it d, either before or after removing the structure from the form.

The form 10 may be removed from its spindle to permit the dismounting of both 'of said blankstherefrom. Said blanks prelerably are then detached from the form and molded and vulcanized in the mold 29, 30, althoughl do not wholly limit myself to vulcanizing them apart from the form upon which they are wound. The vulcanization in this instance fixes or sets the structure in substantially the same disk-like form in which it was built up, said structure being substantiallystraight, in segmental cross-section, that is, in the cross-section of any segment. While the preferred form is thatshown, in which the disk is fiat, the invention is not wholly confined to such shape. The bolt holes 31, when desired, may be formed either before or during the molding operation, or may be punched or out in the disk after vulcanization thereof. ln some in.- stances the punching of the holes, whereby the strands are merely separated insteadof being'severecl, may beef advantage in providing a stronger anchorage of the bolts or other members mounted in the holes,

The particular finished product here shown, which may be economically by the method and a paratus a ove described, hasits strengt giving strands all disposed obliquely with relation to the'several lines of force in the disk, as used in a universal joint, for example, and this bias arrangement of the strands afi'ords'elasticity along the lines of force so that an excessive strain of the strands does not result from the contemplated relative angular movement of the shaltsout of alignment with each other. Thisi's a very substantial advantage,

since such relative movement of the shafts acts upon the disk, to distortit, with a very great mechanical advantage, the shafts act-.

ing aslevers, and where the strands are so dis osed, as in prior practice, as to be unyie ding against the distorting force of such relative movement, not only is the desired free movement or the shafts interfered with, but the strains to which the strands are sub jected result in rapid deterioration of the dish. The same is true with respect to rela tive axial movement of the shafts, where the spider arms act upon the disk with a great funicular advantage.

producedv il lll till) Marh 22 1927. 1,622,049 c. H. RAMSEY TENTERING MACHI NE Filed ed. 11. 1926 ZSheets-Sheetl ATTORNEY.

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